The Clinical Application Value of the Prognostic Nutritional Index for the Overall Survival Prognosis of Patients with Esophageal Cancer: A Robust Real-World Observational Study in China

Table 3

Patients’ characteristics in the testing cohort.

Variables	Overall (%)	PNI		value
		High risk ()	Low risk ()
	1329	502	827
Age				0.003
≤60	546 (41.1)	180 (35.9)	366 (44.3)
>60	783 (58.9)	322 (64.1)	461 (55.7)
Postoperative adjuvant treatment				0.016
No	702 (52.8)	287 (57.2)	415 (50.2)
Yes	627 (47.2)	215 (42.8)	412 (49.8)
Gender				0.015
Female	244 (18.4)	75 (14.9)	169 (20.4)
Male	1085 (81.6)	427 (85.1)	658 (79.6)
KPS score				1
≥80	1324 (99.6)	500 (99.6)	824 (99.6)
≤70	5 (0.4)	2 (0.4)	3 (0.4)
Tumor size				0.001
<5 cm	898 (67.6)	311 (62.0)	587 (71.0)
≥5 cm	431 (32.4)	191 (38.0)	240 (29.0)
Tumor grade				0.953
Well differentiated	236 (17.8)	92 (18.3)	144 (17.4)
Moderate differentiated	540 (40.6)	205 (40.8)	335 (40.5)
Poorly differentiated	516 (38.8)	192 (38.2)	324 (39.2)
Other	37 (2.8)	13 (2.6)	24 (2.9)
Tumor location				0.846
Lower chest	280 (21.1)	105 (20.9)	175 (21.2)
Middle chest	706 (53.1)	263 (52.4)	443 (53.6)
Upper chest	343 (25.8)	134 (26.7)	209 (25.3)
T stage				0.037
T0-2	420 (31.6)	141 (28.1)	279 (33.7)
T3-4	909 (68.4)	361 (71.9)	548 (66.3)
N stage				0.168
N0-1	993 (74.7)	364 (72.5)	629 (76.1)
N2-3	336 (25.3)	138 (27.5)	198 (23.9)
M stage				1
M0	1325 (99.7)	500 (99.6)	825 (99.8)
M1	4 (0.3)	2 (0.4)	2 (0.2)
TNM stage				0.132
0-II	579 (43.6)	205 (40.8)	374 (45.2)
III-IV	750 (56.4)	297 (59.2)	453 (54.8)